(Adds details on the deadline extension)
By Tatiana Bautzer and Carolina Mandl
SAO PAULO, March 20 (Reuters) - Brazil's state-run oil company Petrobras will push back the deadline on binding offers for eight of its refineries, according to a securities filing on Friday, after plunging oil prices scrambled efforts to raise more than $10 billion.
Petroleo Brasileiro SA, as the firm is formally known, is likely to postpone the deadline by 30 to 60 days, said a person with direct knowledge of the matter, requesting anonymity because the timeline had not been announced.
The source said Petrobras decided to extend the deadline as extreme volatility in global oil prices demands the attention of senior executives from several bidders. Travel disruptions have also gotten in the way of their visits to Brazil.
Bidders for the refineries include U.S., Chinese and Middle Eastern investors, Reuters reported in January. (Reporting by Tatiana Bautzer and Carolina Mandl Editing by Brad Haynes)